2019/05/21 by David Navarro-Solís, David J. Navarro-Solis, Félix Cancino‐Trejo +6
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced ceramic materials synthesis #Catalysis #Chemical engineering #Chemistry #Diffusion #Electron backscatter diffraction #FOS: Physical sciences #Fission products #Grain boundary #Grain boundary diffusion coefficient #High Temperature Alloys and Creep #Materials Science (cond-mat.mtrl-sci) #Materials science #Metallurgy #Microstructure #Nuclear Materials and Properties #Nuclear reactor physics and engineering #Palladium #Physics #Radiochemistry #Thermodynamics #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1905.12157
arxiv created 2019/05/21 · openalex publication_date 2019/05/21 · arxiv updated 2019/05/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
One of the main challenges in the study of TRISO (Tristructural Isotropic)\ncoated fuel particles is the understanding of the diffusion of fission products\nthrough SiC. Among the elements produced inside the uranium kernel, it has been\nsuggested that Pd might enhance the diffusion of other fission products. In\nthis work we have studied the interaction between Pd and SiC. We have observed\nthat as Pd diffuses it can change the chemical composition and microstructure\nof SiC. Electron Backscattered Diffraction (EBSD) analysis showed that Pd\nincreased the amount of high angle grain boundaries from 47 to 59%.\nFurthermore, we have observed that as Pd diffused, it changed the composition\nof SiC by leaving a trail of excess carbon at the grain boundary. This change\nin localized chemical composition and microstructure suggests a grain boundary\ncomplexion transition induced by Pd and a new way in which Pd can lead to\nfaster diffusion routes for other fission products.\n